Process for hydrocracking carbonaceous material to provide fuels or chemical feed stock

Patent · Tue Sep 30 04:00:00 EDT 1980

OSTI ID:6799557

Duncan, D A

A process is disclosed for hydrocracking coal or other carbonaceous material to produce various aromatic hydrocarbons including benzene, toluene, xylene, ethylbenzene, phenol and cresols in variable relative concentrations while maintaining a near constant maximum temperature. Variations in relative aromatic concentrations are achieved by changing the kinetic severity of the hydrocracking reaction by altering the temperature profile up to and quenching from the final hydrocracking temperature. The relative concentration of benzene to the alkyl and hydroxyl aromatics is increased by imposing increased kinetic severity above that corresponding to constant heating rate followed by immediate quenching at about the same rate to below the temperature at which dehydroxylation and dealkylation reactions appreciably occur. Similarly phenols, cresols and xylenes are produced in enhanced concentrations by adjusting the temperature profile to provide a reduced kinetic severity relative to that employed when high benzene concentrations are desired. These variations in concentrations can be used to produce desired materials for chemical feed stocks or for fuels.

• Assignee: Department of Energy
• Patent Number(s): US 4225414
• OSTI ID: 6799557
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010406* -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
AROMATICS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCRACKING
HYDROGEN
MATERIALS
NONMETALS
ORGANIC COMPOUNDS
PYROLYSIS
THERMOCHEMICAL PROCESSES
VERY HIGH TEMPERATURE